Rhysleo, after reading your thread I suggest you Google "marine battery maintenance", and read a while. When asked about your battery information you responded with the make and model, but with no specifics about the size, amps, etc., thus from my observation you don't have a clue about what you are dealing with. A battery or batteries are the heart of our boats, thus we must be well informed about them. Learn about your amp capacity of your battery, the amp draw of your bait well, and any additional electrical equipment you might use, such, as your anchor and running lights. I use a baitwell switch which cycles the pump on and off every few minutes to keep the bait alive, or it can run continuously for filling the baitwell the first time. There are switches available which can be set to different cycle lengths, but mine is set at a fixed interval of on and off. The purpose of the intermittent switch is to save the battery amps and to keep the bait alive at the same time. Good luck with your battery knowledge.